Are "swan grapes" the same as gooseberries?

I was at the produce market today and saw a new item on offer: "swan grapes." A Google search is not turning up anything. They were spherical, the size of cherry tomatoes (maybe a little larger), and were a yellow-green. They looked like gooseberries to me.

Are "swan grapes" a thing or maybe the person labeling the product didn't speak English and something got mixed up in translation?